CVE-2021-27043 Memory corruption in Autodesk Advanced Steel, Civil 3D, AutoCAD, AutoCAD LT, AutoCAD Architecture, AutoCAD Electrical, AutoCAD Map 3D, AutoCAD Mechanical, AutoCAD MEP, AutoCAD Plant 3D
An arbitrary address write vulnerability in Autodesk DWG applications allows code execution if the victim enables full page heap.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-27043?
CVE-2021-27043 is a high-severity memory corruption vulnerability in Autodesk Advance Steel, published on 25 Jun 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An Arbitrary Address Write issue in the Autodesk DWG application can allow a malicious user to leverage the application to write in unexpected paths. In order to exploit this the attacker would need the victim to enable full page heap in the application.
Weakness: CWE-787
Which versions are affected by CVE-2021-27043?
It affects 11 products.
Products include Autodesk Advance Steel, Autodesk Autocad, Autodesk Autocad Architecture, Autodesk Autocad Electrical, Autodesk Autocad Lt, Autodesk Autocad Map 3d and 5 more.
How do I fix CVE-2021-27043?
No fix has been published for CVE-2021-27043 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-27043 being exploited?
There is no known exploitation of CVE-2021-27043 in the wild and no public exploit code.
Other vulnerabilities in Autodesk Advance Steel
- CVE-2026-7406 BMP File Parsing Untrusted Pointer Dereference in certain Autodesk products
- CVE-2026-16463 DXF File Parsing Heap-Based Overflow in Autodesk AutoCAD
- CVE-2025-8893 PDF File Parsing Out-of-Bounds Write Vulnerability
- CVE-2025-8894 PDF File Parsing Heap-Based Buffer Overflow Vulnerability
- CVE-2025-5046 DGN File Parsing Out-of-Bounds Read Vulnerability
Sources
Also known as GHSA-vwxh-hr5c-v523.